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The Hundred: How to Do Pilates' Signature Exercise, Step by Step
If you've ever taken a Pilates class, you'll know the Hundred — it's usually the first thing on the mat, all rapid little arm pulses and slightly breathless counting. It looks deceptively simple, but done well it switches on your deep core, warms the body and sets the tone for everything that follows. Here's exactly how to do the Hundred, breath by breath, with friendly modifications so you can build up at your own pace.
What the Hundred actually is (and why it's first)
The Hundred is a classic mat-Pilates exercise where you hold a curled-up position while pumping your arms up and down beside your body. You breathe in for five arm beats and out for five, repeated ten times — which adds up to the hundred beats that give the move its name.
It's traditionally placed at the start of a session because it works as a warm-up for the core and a primer for your breathing. The goal isn't to thrash through it; it's to find steady, controlled breath while your abdominals stay switched on. Think of it as a gentle wake-up call for the muscles you'll use throughout your practice, not a test of endurance.
Before you start: setting up well
Roll out a mat and give yourself a minute to warm up — a few knee hugs, pelvic tilts and shoulder rolls are plenty. Lie on your back with your knees bent, feet flat and hip-width apart, arms long by your sides. Let your spine settle into its natural curve rather than flattening it forcefully into the floor.
Find your neutral pelvis and a sense of your low belly drawing gently inwards, as if you were zipping up a snug pair of jeans. This light engagement, not a clenched brace, is what protects your back and makes the exercise effective.
How to do the Hundred, step by step
Move slowly through these steps the first few times. Quality of breath and a stable torso matter far more than getting all the way to a hundred.
- Lie on your back, knees bent over your hips in a tabletop position (shins parallel to the floor), arms long by your sides, palms down.
- Breathe in to prepare. As you breathe out, gently draw your low belly in and nod your chin slightly, curling your head, neck and shoulders off the mat — keep your gaze towards your thighs, not the ceiling.
- Reach your arms long and low, hovering them a few inches above the floor beside your hips.
- Begin pumping your arms with small, brisk beats up and down, keeping them straight and the movement coming from the shoulders.
- Breathe in through your nose for five beats, then out through your mouth for five beats. That's one full cycle.
- Repeat for ten breath cycles to reach one hundred beats, keeping your torso still and your lower back quiet throughout.
- To finish, stop the pulses, breathe in, and on an exhale slowly lower your head and bring your knees back down to rest.
Breathing cues that make it click
The breath is the heart of the Hundred, so don't let it become an afterthought. Inhale wide into the sides and back of your ribcage for a count of five, then exhale fully for five, drawing your abdominals a little deeper as the air leaves. Many people find the long, complete exhale is where the core really engages.
If the rhythm feels awkward at first, count out loud or silently in your head — "in, two, three, four, five; out, two, three, four, five." Smooth, percussive breathing keeps you from holding your breath, which is the most common way the exercise goes wrong.
Modifications and how to progress
The Hundred is endlessly scalable, so meet yourself where you are today. If your neck feels strained, rest your head down on the mat and just do the arm beats and breathing — there's no shame in it, and it's often the smarter choice while you build strength.
For an easier load, keep your feet flat on the floor or your knees in tabletop. To progress, extend your legs towards the ceiling, then gradually lower them — the closer your legs come to the floor, the harder your core works, so only go as low as you can keep your lower back from arching up. Start with twenty or forty beats and add more over time.
Common mistakes to avoid
A few small tweaks will get you far more from the move and keep it comfortable:
- Pulling on your neck — lead with your breastbone, not your chin, and keep the back of your neck long.
- Letting the lower back arch off the mat — raise your legs higher or bend your knees until your core can hold the position.
- Holding your breath — keep the five-in, five-out rhythm flowing the whole time.
- Flapping the arms from the elbows — the pulse is small and controlled, powered from the shoulders.
- Rushing to a hundred — fewer, well-controlled beats beat a hundred sloppy ones every time.
The Hundred rewards patience: a handful of focused, well-breathed beats will do more for your core than grinding out the full count with a strained neck and a held breath. Build it up gradually, and let it become the calm, steady opener to the rest of your practice.
A quiet space helps too — some people like to set the scene with calming sound and gentle scenery before they roll onto the mat. As always, warm up first, listen to your body, and check in with a qualified instructor or healthcare professional if you're pregnant, recovering from injury, or have any concerns about your back or neck.